Isx 870 with 1.2 million miles 05 international

[Mattman]

Sounds like you have been treating your engine well and it in turn has treated you well. Those 9400i trucks were good trucks.

If you don't have much oil consumption I would replace rod and main bearings and the oil pump and keep running it. You would replace the oil pan gasket when doing the bearings so that should fix that oil leak.

How bad is the oil leak in the front and rear?